LM5164DDAR - 100V 1A Sync Buck Converter | Texas Instruments
MPN: LM5164DDAR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
Drop-in alternatives for LM5164DDAR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
LM5164QDDARQ1
β Drop-Inπ Reference alternative (not in catalog)
LM5164DDAT
β Drop-Inπ Reference alternative (not in catalog)
LM5165DDAR
β Drop-Inπ Reference alternative (not in catalog)
LM5163DDAR
β Drop-Inπ Reference alternative (not in catalog)
TPS54360DDAR
β Drop-Inβ In Stock
$1.6 / Unit
View Datasheet βLM5164DDAR Maximum Ratings & Electrical Characteristics
| Input Voltage Range | 6 V to 100 V |
| Output Voltage Range | 1.2 V to 90 V (adjustable) |
| Output Current | 1 A |
| Switching Frequency | 1 MHz |
| Quiescent Current | [DATA_NEEDED: quiescent current] Β΅A |
| Duty Cycle | 100% (max) |
| Package | 8-PowerSOIC (HSOIC-8, 3.90 mm width) |
| Pin Pitch | 1.27 mm |
| Control Architecture | Peak current-mode |
| PGOOD Indicator | Open-drain |
| Protection Features | Cycle-by-cycle current limit, thermal shutdown, hiccup-mode short-circuit protection |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL level] |
LM5164DDAR Pin Configuration
| Pin 1 | VIN β Input supply voltage |
| Pin 2 | SW β Switch node connection to inductor |
| Pin 3 | GND β Ground |
| Pin 4 | FB β Feedback input for output voltage regulation |
| Pin 5 | EN/UVLO β Enable and undervoltage lockout programming |
| Pin 6 | PGOOD β Open-drain power good indicator |
| Pin 7 | RT β Timing resistor for switching frequency |
| Pin 8 | VCC β Internal bias supply output |
| Pin 9 | PAD β Exposed thermal pad (ground) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LM5164DDAR is suitable for 6 applications: Industrial Power Supplies, Automotive Body Electronics, Battery Management Systems, Motor Drives, Telematics and Remote Monitoring, LED Lighting.
Industrial Power Supplies
The LM5164DDAR's 6-100V input range and 1A output make it ideal for industrial power supplies fed from 24V or 48V buses. Its 1MHz switching frequency allows compact magnetics, and the ultra-low IQ reduces standby power. The PGOOD indicator simplifies sequencing in multi-rail systems. With peak current-mode control, it provides stable operation with ceramic output capacitors, essential for noise-sensitive industrial sensors and PLCs.
Recommended
Automotive Body Electronics
In automotive systems, the LM5164DDAR handles 12V battery transients up to 100V, eliminating the need for external surge suppression. Its 1A output powers ECUs, sensors, and CAN transceivers. The ultra-low IQ is critical for always-on modules to minimize battery drain. For AEC-Q100 compliance, use the LM5164QDDARQ1 variant. The 1.27mm pin pitch ensures high-voltage creepage, and the PowerPAD aids thermal management in under-hood environments.
Recommended
Battery Management Systems
The LM5164DDAR is well-suited for battery management systems (BMS) in electric vehicles and energy storage, where input voltage can vary widely (e.g., 48V to 100V). Its 1A output powers monitoring ICs, AFEs, and communication interfaces. The ultra-low IQ extends battery life during standby. The device's robust protection features, including cycle-by-cycle current limit and thermal shutdown, ensure safe operation in harsh environments. The PGOOD output can signal fault conditions to the system controller.
Recommended
Motor Drives
The LM5164DDAR provides a regulated auxiliary supply for gate drivers and control logic in motor drives. Its wide input range accommodates the DC bus voltage variations (e.g., 24V to 100V) in industrial motor control. The 1A output can power multiple gate drivers and a microcontroller. The 1MHz switching frequency allows a small inductor, saving PCB space. The device's fast transient response helps maintain stable voltage during motor current spikes.
Recommended
Telematics and Remote Monitoring
The LM5164DDAR's ultra-low quiescent current is ideal for always-on telematics and remote monitoring devices that run on battery or solar power. Its wide input range (6-100V) allows direct connection to 12V or 24V vehicle batteries, handling load dumps and transients. The 1A output powers cellular modules, GPS receivers, and sensors. The PGOOD indicator enables power sequencing and fault reporting. The small HSOIC-8 package fits space-constrained designs.
Recommended
LED Lighting
The LM5164DDAR can be used in LED lighting systems that require a regulated voltage from a high-voltage DC bus (e.g., 48V). Its 1A output can drive LED strings with constant voltage, or be used as a pre-regulator for LED drivers. The wide input range handles voltage variations, and the 1MHz switching frequency allows small external components. The device's thermal shutdown protects against over-temperature in enclosed luminaires.
Recommended
Recommended Products Summary
Engineering reference data for LM5164DDAR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM5164QDDARQ1 | LM5164DDAT | LM5165DDAR | LM5163DDAR | TPS54360DDAR |
|---|---|---|---|---|---|---|
| Package | 8-PowerSOIC (HSOIC-8) | 8-PowerSOIC (HSOIC-8) | 8-PowerSOIC (HSOIC-8) | 8-PowerSOIC (HSOIC-8) | 8-PowerSOIC (HSOIC-8) | 8-PowerSOIC (HSOIC-8) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 6V to 100V | 6V to 100V | 6V to 100V | 6V to 100V | 6V to 65V | 4.5V to 60V |
| Output Current | 1A | 1A | 1A | 1.5A | 0.5A | 3.5A |
| Switching Frequency | 1MHz | 1MHz | 1MHz | 1MHz | 1MHz | 100kHz to 2.5MHz |
| Quiescent Current | [DATA_NEEDED] Β΅A | [DATA_NEEDED] Β΅A | [DATA_NEEDED] Β΅A | [DATA_NEEDED] Β΅A | [DATA_NEEDED] Β΅A | 146 Β΅A |
| Automotive Grade | No | Yes (AEC-Q100) | No | No | No | No |
| PGOOD Indicator | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Wide input voltage range up to 100V (vs TPS54360DDAR)
- Ultra-low quiescent current (vs TPS54360DDAR)
- Automotive grade option (vs LM5164DDAT)
Design Notes
For high-voltage operation up to 100V, maintain adequate creepage and clearance between high-voltage pins (VIN, SW) and low-voltage pins (FB, PGOOD). The 1.27mm pin pitch helps, but ensure PCB layout follows IPC-2221 standards. Use a solid ground plane and place the input capacitor close to VIN and GND pins to minimize loop inductance.
The PowerPAD must be soldered to a copper area on the PCB for effective heat dissipation. For 1A output at high input-output differentials, power dissipation can be significant. Calculate junction temperature using theta_JA from the datasheet and provide adequate copper area (e.g., 1 square inch) for thermal relief.
Do not exceed the absolute maximum input voltage of 100V. Use a proper input capacitor with sufficient voltage rating (e.g., 100V or higher) and low ESR. Ensure the feedback resistor divider uses 1% tolerance resistors to maintain output accuracy. The EN/UVLO pin can be used to set undervoltage lockout; leave floating if not used, but tie to VIN through a resistor if needed.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; use LM5164QDDARQ1 for automotive.
